Wiktionarypar bytecode Refimprove date January 2009 Bytecode , also known as p code machine p code portable ... execution. The name bytecode stems from instruction sets which have one byte opcode s followed by optional parameters. Intermediate representations such as bytecode may be output by programming language ... hardware and operating system dependence by allowing the same code to run on different platforms. Bytecode ... code. Execution A bytecode program may be executed by parsing and directly executing the instructions, one at a time. This kind of bytecode interpreter is very portable. Some systems, called dynamic translators, or just in time compilation just in time JIT compilers, translate bytecode into machine ... t lose the portability of the bytecode itself. For example, Java programming language Java and Smalltalk ... the bytecode to machine code before execution. This introduces a delay before a program is run, when bytecode is compiled to native machine code, but improves execution speed considerably compared ... the source code into bytecode, and then passing the bytecode to the virtual machine. Therefore ... is typically transformed into bytecode format by a compiler. Examples of compilers include the one ... in the Adobe Flex SDK. Visual FoxPro compiles to bytecode m code of the MATLAB programming language ... programming language Bytecodes of many implementations of the Smalltalk programming language Java bytecode ... of Lisp programming language Lisp . These features are compiled into bytecode. This architecture allows users to customize the editor with a high level language, which after compilation into bytecode ... using bytecode interpreter CLISP implementation of Common Lisp compiles only to bytecode CMUCL and Scieneer Common Lisp implementations of Common Lisp can compile either to bytecode or to native code bytecode is much more compact Embeddable Common Lisp implementation of Common Lisp can compile to bytecode or C code Icon programming language Icon programming language Objective Caml Ocaml programming ... more details
Java bytecode is the form of instructions that the Java virtual machine executes. Each bytecode opcode ... not need to be aware of or understand Java bytecode at all. However, as suggested in the IBM developerWorks journal, Understanding bytecode and what bytecode is likely to be generated by a Java compiler ... bytecode Understanding bytecode makes you a better programmer ref Instructions See also Java bytecode instruction listings As each byte has 256 potential values, there are 256 possible opcodes ... and operators must be used . Model of computation The model of computation of Java bytecode is that of a stack ... add two values and move the result to a different location. Similar disassembled bytecode might look ... The most common language targeting Java Virtual Machine by producing Java bytecode is Java. Originally ... code to Java bytecode but because all the specifications for Java bytecode are now available, other parties have supplied compilers that produce Java bytecode. Examples of other compilers include Jikes , compiles from Java to Java bytecode developed by IBM , implemented in C Espresso, compiles from Java to Java bytecode Java 1.0 only GCJ , the GNU Compiler for Java, compiles from Java to Java bytecode ... bytecode by hand. Assembly code may be also generated by machine, for example by compiler targeting ... are specified using bytecode instructions. ref http www.judoscript.org jamaica.html Jamaica The Java ... bytecode C to Java byte code compiler C to bytecode compilers C to Java byte code compiler s Clojure MIDletPascal JavaFX code is also compiled to Java bytecode. Execution Java bytecode is designed ... free and commercial products. See Java virtual machine If executing Java bytecode in a Java virtual machine is not desirable, a developer can also compile Java source code or Java bytecode directly ... Java bytecode natively. Such processors are known as Java processor s . Support for dynamic languages ... Java bytecode instruction listings Class file format List of JVM languages Java backporting tools ... more details
Main Java bytecode This is a list of the instructions that make up the Java bytecode , an abstract machine language that is ultimately executed by the Java virtual machine . The Java bytecode is generated by language compilers targeting the Java Platform , most notably the Java programming language . class wikitable Mnemonic Opcode br in hex Other bytes Stack br before after Description colspan 5 A aaload align center 32 arrayref, index value loads onto the stack a reference from an array aastore align center 53 arrayref, index, value stores into a reference in an array aconst null align center 01 null pushes a null reference onto the stack aload align center 19 index objectref loads a reference onto the stack from a local variable index aload 0 align center 2a objectref loads a reference onto the stack from local variable 0 aload 1 align center 2b objectref loads a reference onto the stack from local variable 1 aload 2 align center 2c objectref loads a reference onto the stack from local variable 2 aload 3 align center 2d objectref loads a reference onto the stack from local variable 3 anewarray align center bd indexbyte1, indexbyte2 count arrayref creates a new array of references of length count and component type identified by the class reference index indexbyte1 < < 8 indexbyte2 in the constant pool areturn align center b0 objectref empty returns a reference from a method arraylength align center be arrayref length gets the length of an array astore align center 3a index objectref stores a reference into a local variable index astore 0 align center 4b objectref stores a reference into local variable 0 astore 1 align center 4c objectref stores a reference into local ... for historical reasons See also Java bytecode , a general description of the java bytecode within the context of the JVM ARM9E , a Central processing unit CPU family with direct Java bytecode execution ability Common Intermediate Language CIL , a similar bytecode specification that runs on the Common ... more details
.abc may be a file extension for ActionScript bytecode Clean programming language bytecode abc notation , a language for notating music using the ASCII character set See also ABC disambiguation disambig ... more details
code analysis FindBugs uses BCEL to analyze Java bytecode for code idioms which indicate bugs ... index.html Jakarta ByteCode Engineering Library The BCEL Project Home Page. http jakarta.apache.org ... more details
. http www.drgarbage.com bytecode visualizer lt.html Bytecode Visualizer LT free Eclipse plugin for viewing and debugging Java bytecode which makes use of ASM library Category OW2 Consortium Category ... more details
noref date January 2010 Infobox Software name Javassist logo screenshot caption developer Shigeru Chiba programmer Shigeru Chiba latest release version 3.13.0.GA latest release date release date 2010 07 19 latest preview version latest preview date operating system Cross platform programming language Java programming language Java genre bytecode Engineering Library license dual license of the Mozilla Public License MPL and LGPL . website http www.csg.is.titech.ac.jp chiba javassist Javassist is a Java programming language Java software library library providing means to manipulate the Java bytecode of an application. In this sense Javassist provides the support for structural reflection programming reflection , i.e. the ability to change the implementation of a class programming class at Run time computing runtime . Bytecode manipulation is performed at Loader computing load time through a provided class loader . See also Portal Java ObjectWeb ASM Byte Code Engineering Library External links http www.csg.is.titech.ac.jp chiba javassist Javassist project home http labs.jboss.com javassist javassist at JBoss Labs Category Java libraries compu lang stub ... more details
The string pyc can refer to as an abbreviation PYC Potsdam er Yacht Club pyc a compiler for Python programming language Python bytecode , compiling .py code into .pyc code PYC Shatin Pui Ying College in Hong Kong, China as a prefix PYc Coastal Patrol Yacht Patrol Yacht coastal United States Navy see List of patrol vessels of the United States Navy disambig ... more details
notability Products date September 2010 refimprove date September 2010 NOTOC Apparat is an Open source open source language manipulation and optimization framework for the ActionScript language released under the GNU Lesser General Public License LGPL . It may also be used to perform static code analysis like reaching definitions and dominance analysis. The Apparat framework is inspired by Soot software Soot and also written in the Java programming language Java programming language. It contains command line tools to work with SWF files. Dump The Dump tool extracts information of a compiled SWF file by analyzing its bytecode and structure. It can generate Unified Modeling Language UML diagrams and Inheritance object oriented programming inheritance graphs . TDSI TDSI is a command line tool which allows ActionScript developers to use the fast Alchemy Adobe Alchemy opcode s. The use of predefined functions will be replaced with the corresponding bytecode resulting in a significant speed improvement. Example The following example shows the behaviour of TDSI. Since the call to a static method is considered slow ref cite web url http www.kalengibbons.com blog index.php 2009 05 performance testing static methods versus instance methods title Performance testing static methods versus instance methods publisher Kalen Gibbons accessdate 2009 09 29 ref it will be replaced with the corresponding Alchemy opcode. ActionScript Memory.writeInt 1, 0 Pseudo bytecode GetLex Memory PushByte 1 PushByte 0 CallVoid writeInt , 2 After inline expansion PushByte 1 PushByte 0 WriteInt TAAS TreeAddressActionScript TAAS is an intermediate representation of ActionScript Bytecode in optional Static single assignment form SSA form . The TAAS compiler is an optimizing compiler supporting Copy propagation Constant folding Strength reduction Loop invariant code motion Inline expansion See also Soot software List of tools for static code analysis References reflist External links http apparat.googlec ... more details
Visual Eiffel is an implementation of the Eiffel programming language Eiffel programming language developed and distributed by Object Tools GmbH, a German company. Visual Eiffel provides an integrated development environment running on Microsoft Windows . A major design goal is to provide an environment that, unlike EiffelStudio , does not use an original user interface paradigm but instead is comfortable to programmers familiar with such tools as Microsoft s Visual Studio and Borland s Borland Delphi Delphi . Visual Eiffel includes a Display Machine for developing GUI applications. While many other Eiffel compilers generate C programming language C , Java programming language Java bytecode or bytecode for .NET framework .NET , the Visual Eiffel compiler generates native X86 code. The compiler not the graphical environment is, besides Windows, also available on Linux . Licencing is free for personal use with banner or commercial, with the core GPL. http visual eiffel.com Visual Eiffel web site Category Integrated development environments compu prog stub ... more details
primary sources date January 2011 Alchemy is a research project from Adobe Systems that allows compiling C and C code to ActionScript Virtual Machine AVM2 , so that it can be run on Flash Player or Adobe AIR . This is achieved by compiling C C code to LLVM bytecode and then translating LLVM to Actionscript 3 with inlined AVM2 bytecode, which is then compiled with a specialized actionscript compiler. The resultant SWF SWC is considerably faster than normal Actionscript code, but up to 2x 10x slower than native C code. ref http labs.adobe.com technologies alchemy Adobe Labs Alchemy ref See also Apparat software Notes Reflist External links http labs.adobe.com technologies alchemy Alchemy at Adobe Labs http www.flashmagazine.com news detail alchemy toolkit preview version out on adobe labs Alchemy Toolkit Preview out on Adobe Labs http www.flashmagazine.com news detail play doom online thanks to adobe alchemy Play Doom Online http www.asvguy.com 2008 11 a flash of doom an alchemy that works.html A Flash of Doom http www.quaddicted.com engines files quake flash.swf Play Quake http www.automatastudios.com 2008 11 21 understanding adobe alchemy Understanding Adobe Alchemy Category Adobe Systems pt Alchemy Adobe ... more details
A Java compiler is a compiler for the Java programming language Java programming language . The most common form of output from a Java compiler is Class file format Java class files containing platform neutral Java bytecode . There exist also compilers emitting optimized Machine code native machine code for a particular hardware operating system combination. Most Java to bytecode compilers, Jikes being a well known exception, do virtually no Optimization computer science optimization , leaving this until Run time computing runtime to be done by the JRE Citation needed date April 2007 . The Java Virtual Machine JVM loads the class files and either interpreter computing interprets the bytecode or just in time compilation just in time compiles it to machine code and then possibly optimizes it using dynamic compilation . The very first Java compiler developed by Sun Microsystems was written in C using some libraries from C . Citation needed date February 2007 Major Java compilers As of 2010, the following are major Java compiler s javac , included in Java Development Kit JDK from Sun Microsystems , open sourced since 13 November 2006. GCJ , a part of GNU Compiler Collection gcc which compiles C programming language C , Fortran , Pascal programming language Pascal and other programming language s besides Java. It can also generate native code using the back end of gcc. ECJ, the Eclipse Compiler for Java, is an open source incremental compiler used by the Eclipse software Eclipse Java decompilers A Java decompiler tries to reverse the process of compiling, that is it tries to decompile Java bytecode files .class back to Java source files .java . DJ Java Decompiler http www.neshkov.com Uses JAD 10 use trial version JAD JAva Decompiler JAD , written in C , free for non commercial use. JD Java Decompiler JD http java.decompiler.free.fr , younger project, includes GUI, optional Eclipse plugin. JODE http jode.sourceforge.net , decompiler and optimizer, open source. Mocha decom ... more details
lowercase title eAccelerator Not to be confused with the computer security company eAcceleration . eAccelerator is a PHP accelerator fork software derived from the MMCache extension computing extension for the PHP programming language . eAccelerator provides a bytecode cache . eAccelerator is open source and thereby free to use and distribute. Old and unmaintained versions also provided an encoder. Every time a PHP script is accessed, PHP usually parses and compiles scripts to bytecode . Once installed, eAccelerator optimizes the compiled bytecode and caches this to shared memory or disk. Upon subsequent accesses to a script, eAccelerator will access cached bytecode if it is available instead of the script being compiled. This avoids the performance overhead of repeated parsing and compilation. Previous eAccelerator versions also provided functions ref http bart.eaccelerator.net doc phpdoc eAccelerator 0.9.5 PHP interface documentation Bot generated title ref for use in PHP scripts that allow access to shared memory , automatic web caching web content caching , and other related tasks. These were removed as of version 0.9.6rc1. Old eAccelerator versions had an encoder component that creates a file that cannot be as easily read as a normal PHP script, offering some code protection. A dedicated extension named eLoader is available to process such encoded scripts if the eAccelerator extension is not desired. This functionality has been removed from the current developer version and will not be part of the next release. References This article uses the Cite.php citation mechanism. If you would like more information on how to add references to this article, please see http meta.wikimedia.org wiki Cite Cite.php div class references small style moz column count 2 column count 2 references div See also Zend Performance Suite Alternative PHP Cache External links http eaccelerator.net eAccelerator Web Site http www.sitebuddy.com PHP Accelerators eAccelerator windows binaries ... more details
The JStik is a microcontroller based on the aJile Systems line of embedded Java processor s. It is novel in that it uses Java programming language Java Java bytecode byte code as the native Machine code machine language . This makes it very fast at executing Java code while still maintaining the benefits of programming in a high level language like Java. External links http www.systronix.com jstik Jstik JStik Home http www.systronix.com Systronix Inc. Makers of the JStik system. http www.ajile.com aJile Systems Inc. Makers of the Silicon Category Microcontrollers microcompu stub ... more details
A Java processor is the implementation of the Java Virtual Machine JVM in hardware. In other words the Java bytecode bytecodes that make up the instruction set of the abstract machine become the instruction set of a concrete machine. Implementations Up to now only a few Java processors are available picoJava was the first attempt by Sun Microsystems to build a Java processor http www.ajile.com index.php?option com content&view article&id 2&Itemid 6 aJ102 and http www.ajile.com index.php?option com content&view article&id 3&Itemid 7 aJ200 from http www.ajile.com aJile Systems, Inc. . Available on boards from http jstamp.systronix.com Systronix http www.imsystech.com Cjip from Imsys Technologies. Available on boards and with wireless radios from http www.avidwireless.com site AVIDdirector.htm AVIDwireless ref Imsys hedges bets on Java microcode Writable control stores rewritable microcode chip has instruction sets for Java, Forth, C C by Tom R. Halfhill http www.imsystech.com press room press archive press micro p report.pdf ref http ipr.ira.uka.de komodo komodoEng.html Komodo is a multithreaded Java microcontroller for research on real time scheduling http www.inf.ufrgs.br lse FemtoJava is a research project to build an application specific Java processor ARM9E ARM926EJ S is an ARM processor able to run Java bytecode, this technology being named Jazelle Java Optimized Processor ref cite doi 10.1016 j.sysarc.2007.06.001 ref for FPGA s. A PhD thesis is http www.jopdesign.com thesis index.jsp available http shap.inf.tu dresden.de SHAP bytecode processor from the TU Dresden http www.ee.cityu.edu.hk hisc architecture.html jHISC ref cite doi 10.1016 j.micpro.2005.12.007 ref provides hardware support for object oriented functions http www.vivaja.com ObjectCore is a multicore Java processor designed by http www.vivaja.com Vivaja Technologies . References Reflist Category Java virtual machine de Java Prozessor es Procesador Java ko ... more details
guarantees. JIT builds upon two earlier ideas in run time environments bytecode compilation and dynamic ... bytecode into native machine code . Several modern runtime environments, such as Microsoft ... for high speed code execution. Overview In a bytecode compiled system, source code is translated to an intermediate representation known as bytecode . Bytecode is not the machine code for any particular computer, and may be portable among computer architectures. The bytecode may then be interpreted ... of bytecode. At the time a piece of code is to be executed, the just in time compiler will compile .... In contrast, a traditional interpreted virtual machine will simply interpret the bytecode, generally ... compiling to bytecode, with even worse performance. Statically compiled code or native code is compiled ... of bytecode interpretation Much of the heavy lifting of parsing the original source code ... from bytecode to machine code is much faster than compiling from source Citation needed date February 2011 . The deployed bytecode is portable, unlike native code. Since the runtime has control over the compilation, like interpreted bytecode, it can run in a secure sandbox. Compilers from bytecode to machine code are easier to write, because the portable bytecode compiler has already done much of the work ... is done only once, and a link is created between the bytecode and the corresponding compiled code .... Although this is possible with statically compiled garbage collected languages, a bytecode system ... taken to load and compile the bytecode. Sometimes this delay is called startup time delay . In general ... monitors which sequences of bytecode are frequently executed and translates them to machine code for direct execution on the hardware. For bytecode which is executed only a few times, this saves the compilation time and reduces the initial latency for frequently executed bytecode, JIT compilation ... of the number of times a method has executed combined with the bytecode size of a method as a heuristic ... more details
which is ideally independent of particular implementations. Bytecode interpreters Main Bytecode There is a spectrum ... performed before the program is executed. For example, Emacs Lisp is compiled to bytecode , which ... and therefore not tied to any particular hardware . This compiled code is then interpreted by a bytecode ... code for a virtual machine , which is implemented not in hardware, but in the bytecode interpreter ... systems the source language is compiled into F code a bytecode , which is then interpreted by a virtual ... appropriate algorithmic control flow via customized interpreters in similar fashion to bytecode ..., each sentence needs to be parsed just once. As an advantage over bytecode, the AST keeps the global program structure and relations between statements which is lost in a bytecode representation ... than bytecode. Also, it allows to perform better analysis during runtime. However, for interpreters, an AST causes more overhead than a bytecode interpreter, because of nodes related to syntax performing ... of startup time and increased memory use when the bytecode or AST is first compiled. Adaptive ... more details
. Bytecode Java Card bytecode run by the Java Card Virtual Machine is a functional subset of Java Java 2 Standard Edition Java bytecodebytecode run by a Java Virtual Machine, but uses a different encoding optimized for size. A Java Card applet thus typically uses less bytecode than the hypothetical ... as well as the bytecode have therefore been adapted to manage persistent objects. Atomicity. As smart .... The individual write operations performed by individual bytecode instructions and API methods are therefore ... and debug a Java Card program caveat even if debugging occurs with Java bytecode, make sure that the class file fits the limitation of Java Card language by converting it to Java Card bytecode ... more details
Jazelle DBX Direct Bytecode eXecution allows some ARM architecture ARM processors to execute Java bytecode in hardware as a third execution state alongside the existing ARM and Thumb modes. ref http www.arm.com products multimedia java jazelle.html ref Jazelle functionality was specified in the ARMv5TEJ architecture ref name armarm and the first processor with Jazelle technology was the ARM926EJ S . ref http www.us.design reuse.com news news6919.html Shanghai Jade Licenses ARM Prime Starter Kit for DCP SoC ref Jazelle is denoted by a J appended to the CPU name, except for post v5 cores where it is required albeit only in trivial form for architecture conformance. Jazelle RCT Runtime Compilation Target is a different technology and is based on ThumbEE mode and supports ahead of time AOT and just in time JIT compilation with Java and other execution environments. The most prominent use of Jazelle ... used bytecode operations. ARM claims that approximately 95 of bytecode in typical program usage ... is documented it is Java bytecode after all. However, ARM have chosen to remain quiet on the exact execution ... unmodified. Restarting a bytecode such as following a return from interrupt will re execute the complete ... Jazelle for Execution Environments ref A pointer to the next bytecode goes in r14, ref Intel, ftp ... Java bytecode is indicated as the current instruction set by a combination of two bits in the ARM ... in the CPSR, the bytecode instruction set is automatically reselected after task switching and processing of the current Java bytecode is restarted. ref name accelerating Following an entry into the Jazelle ... opcode. The third case will cause a branch to an ARM exception mode, as will a Java bytecode of 0xff ... in hardware until an unhandled bytecode is encountered, or an exception occurs. Between 134 and 149 ...? software handler of next bytecode r13 r14 jpc next bytecode r15 pc current bytecode cpsr J bit current ... has de emphasized Jazelle and Direct Bytecode Execution of JVM bytecodes. In implementation terms ... more details
Mocha is a Java programming language Java decompiler , which allows programmers to translate a program s bytecode into source code . A beta version of Mocha was released in 1996, by Dutch developer Hanpeter van Vliet, alongside an obfuscator named Crema . A controversy erupted and he temporarily withdrew Mocha from public distribution. As of 2009 the program is still available for distribution, and may be used freely as long as it is not modified. Borland s JBuilder includes a decompiler based on Mocha. The company once tried to prevent distribution of Mocha in 1997 by claiming ownership of Hanpeter s intellectual property , despite the fact that Hanpeter had originally allowed it to be distributed freely. See also JAD JAva Decompiler External links http www.brouhaha.com eric software mocha Java Decompiler http news.com.com 2100 1023 222781.html Mocha pulled off the Net http www.javaworld.com javaworld javatips jw javatip22.html Protect your bytecodes from reverse engineering decompilation Category Java development tools ... more details
about the programming language information on the Chile de Arbol pepper Chile de rbol Arbol is a programming language which has been primarily developed for use in Genetic Programming experiments. It is a functional programming language inspired by the ideas of other small and esoteric languages. An Arbol program looks like Simple I O Z a b a b a I1 some input ZZ a b c a b a O1 c and output main Z ZZ Z The first version of the interpreter computing interpreter is written in Objective Caml OCaml following the implementation of the Spineless Tagless G Machine . Each program structure is compiled to intermediate bytecode for execution. External links http iMonad.com arbol Arbol programming language homepage Category Functional languages Category Genetic programming compu lang stub ... more details
Semantic dictionary encoding SDE preserves the full semantic context of source programs while adding further information that can be used for accelerating the speed of Code generation compiler code generation . SDE forms a code generating loader. It is a form of bytecode combined with a Just in time compilation JIT . It is code generation at load time. In an elementary form, the dictionary entries represent nodes in a directed acyclic graph DAG , that describes the actions of the program, as an abstract syntax tree AST in tabular form. It uses a intermediate representation IR , that is based on the encoded abstract syntax tree and symbol table of a program. See also Abstract machine Code generation compiler Code generation Software portability External links http www.hokstad.com semantic dictionary encoding.html http www.ics.uci.edu franz Site pubs pdf DissETH10497.pdf http www.thefreelibrary.com Intermediate representations of mobile code. a0179977557 Computer stub Category Compiler construction Category Semantics ... more details
JBC may refer to TOC right Organizations Editora JBC Japan Brazil Communication , a Brazilian publisher Jamaica Broadcasting Corporation , a public broadcasting company JoongAng Broadcasting Corporation, the broadcast media arm of the JoongAng Ilbo JoongAng Media Network JBC, a Korean language radio station in Los Angeles, California, see KYPA Japan Boxing Commission Japan Bowling Congress , the major sanctioning body for bowling in Japan John Bosco College, former name of De La Salle John Bosco College in the Philippines Johnson Bible College , in Knoxville, Tennessee, USA Jamestown Business College , a for profit institution in Jamestown, New York Jelly Belly Kenda , UCI Code JBC, Jelly Belly Cycling Team, an elite men s cycling team Judicial and Bar Council Philippines , a body that makes recommendations to fill judicial vacancies Science, technology, and computers JBC Soldering S.L., a manufacturer of soldering tools for electronics Java programming language Java Bytecode http www.google.de search?q JBC Java, http www.google.de search?q Java Bytecode JBC Java programming language Java Beans Component http www.google.de search?q JBC Java, http www.abbreviations.com b1.aspx?KEY 381390 Of course a bit of information as general and small as that is NOT legally copyrightable by STANDS4 LLC, whatever their claims or whining. Java programming language Java Batch Creator http www.google.de search?q JBC Java, http www.antionline.com archive index.php t 256641.html JBoss Cache , a component of JBoss Middleware that caches frequently accessed Java objects to improve application performance Journal of Biological Chemistry , a publication of The American Society for Biochemistry and Molecular Biology Jinbei car , a car brand name of Brilliance Jinbei Automobile Co., Ltd. Other uses Jews by Choice , someone who converted to Judaism JBC group , a Lithuanian hip hop group Junior Bacon Cheeseburger , a Wendy s product Joint Battle Command Platform, or JBC P, see Project Manager ... more details
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